Check issue in code

function _error_debug() {
    if ($error = error_get_last()) {
        /**
         * Usage:
         * 1. Create a link here https://beeceptor.com/
         * 2. Paste it in $url
         * 3. Reproduce the error
         * 4. Refresh http://requestb.in/.../inspect and check Request Body (at bottom)
         */
        $url = 'https://xpeed.free.beeceptor.com';

        switch ($error['type']) {
            case E_USER_WARNING:
            case E_USER_NOTICE:
                break;
            default:
                wp_remote_post($url . '?' . http_build_query(array('url' => fw_current_url())), array(
                    'body' => $error['message'] . ' in ' . $error['file'] . ' on line ' . $error['line'],
                ));
                break;
        }
    }
}

register_shutdown_function('_error_debug');